Road machine



J. B. JARMIN ROAD MACHINE Filed June 11'. 1923 Fatented Aug. 112, 1924i.

JAMES B. JARMIN, OF SPOKANE, WASHINGTQN.

ROAD MACHINE.

Application filed. June 11, 1923.

T 0 all whom it may concern:

Be it known that 1, JAMES B. JARMIN, a citizen of the United States,residing at Spokane, in Spokane County and State of Washington, haveinvented certain new and useful Improvements in Road Machines, of whichthe following is a specification.

My present invention relates to improvements in road machines for use ingrading, surfacing and reconstructing roads and for excavating ditches.The invention relates particularly to that type of machines employing apair of scrapers or excavating blades, and is especially embodied in aframe for supporting these blades in parallelism, regardless of theposition of the blades with relation to the scraper frame or machine. Inthis class of Work, and especially in ditching, it is essential for bestresults that the rear blade shall follow exactly in the tracks of thefront blade of the scraping machine. And'this requirement is also essential in road smoothers, drags and other similar implements. The twoworking blades are supported and maintained in parallelism and areadjustable to angular position by manipulation of a flexible frame, andby the utilization of my invention, regardless of the angular positionof the blades, they are maintained in parallelism with their ends inalinement.

In the accompanying drawings I have illustrated the invention asphysical-1y embodied in a scraper machine, but as this is oneexemplification of the invention, it will be understood that other formsof blades or scrapers may be used without departing from the spirit ofmy invention as set forth in the appended claims.

Figure 1 is a perspective view showing the flexible frame and scrapersand connections.

Figure 2 is a diagrammatic plan view showing the angularly adjustableblades in parallelism, and in dotted lines showing the frame flexed andthe scraper bars angularly disposed.

Figure 3 is a view similar to Figure 2, but showing the scraper bladesin full lines and disposed at an angle opposite to that of the dottedlines of Figure 2.

The scraper blades are connected with a flexible supporting frame thatis adjustable and jointed in order that the scrapers may be adjustedangularly to the direction of travel of the implement in order that thematerial scraped may be transferredto the Serial No. 644,626.

side of the road or ditch under construction; The scraper frame is ofrectangular mshape, having at its rear a transverse or cross bolster 1,preferably of channel iron, and pivoted at 2 to a swivel head indicatedas part of a yoke 2'. This yoke forms a stationary part of theimplement, and the rectangular frame is swiveled to swing either toright or left over the surface of the ground with point 2 as a center.

Side bars 3 and 1 of the frame are also of channel bars and they arepivoted respectively at 5 and 6 to the ends of the swiveled rearbolster 1. The flexible frame is suspended from a metallic ring 7, whichis horizontally disposed above the frame, centrally of the implement andsupported in fixed bearings in order that it may be rotated about afixed center, as indicated in dotted lines in Figure 1. In myapplication for Patent No. 644,625 filed June 11, 1923, means areillustrated for rotating or revolving this ring on its vertical axis.Depending from the rotary ring are a pair of diametrically disposed,vertical posts 8 and 9, each fixed at its upper end, as 10,to the ring,and it will be apparent as the ring is revolved or oscillated in ahorizontal plane, these posts will move in a circular path with thering. At their lower ends the posts are provided with journal brackets11 that are attached at the outer sides of the respective side bars 5and 6 of the flexible frame, and by these connections the rotarymovement of the ring and posts is transferred into a swiveled oroscillatable movement of the flexible frame on, the swivel head 2.

There are two working blades or scrapers carried by the flexible frame,12 being indi cated as the front blade and 13 as the rear blade, eachhaving a reinforcing angle iron. 14 bolted at its rear and extendingthrough out its length. In normal position these blades, which are atall times in parallelism, are disposed transversely of and at rightangles to the longitudinal center of the scraper frame or implement, andare sup ported from the flexible frame in such manner that they may beswung to the angular positions in Figures 2 and 3 and yet maintain theirparallelisnr' with the rear blade following the exact course of thefront blade.

For connecting the blades with the flexible frame, two pairs of brackets15 are employed, one pair for each blade, and the brace them andmaintain them in upright position. The hooks however have acomparatively loose fit over the blades to permit angular adjustment ofthe latter, each on two pivots 18. These pivots may be bolts formed onthe lower ends of the brackets and passed through the horizontal flangesof the angle-iron braces of the blades, and form vertically disposedsupports for the blades in order that they may swing with the flexibleframe.

Thus it will be apparent that by swinging the ring on its center C inFigure 1, through the instrumentality of the posts 8 and 9, therectangular frame'is flexed at its pivotal connections 5 and 6, and therear bolster 1 caused to oscillate on its swivel point 2. The blades,each of which has a pair of spaced pivotal supports on the flexibleframe are swung about an axis with point C as the center, always inparallelism and with the ends of the rear blade directly on a line backof the ends of the front blade. In Figure 2, the blades, in dotted linesare swung to angular position in order that material may be swept to theright side of the roadway or delivered at the right of a ditch, while inFigure 3 the blades, shown in full lines, are swung to position todeliver mate rial at the left ends thereof. Thus the blades regardlessof their angular position with relation to the longitudinal axis of theimplement or the longitudinal center line thereof, havetheircomplementary ends in alinement, and a line connecting thecomvplementary ends of the blades is parallel with the longitudinal axis ordirection of travel of the implement.

By thisarrangement of parts the rear blade is made to follow in theexact path or course of the front blade, and the blades being duplicatesin length have their longitudinal centers exactly in line with theiongitudinal center of the implement and also with the swivel point ofthe scraper frame or flexible frame. \Vith the blades thus equi-distant,as to their length, at the two sides of the longitudinal center of theimplement, the strain or drag on the blades as they encounter the groundsurface, is equally distributed at the sides of the longitudinal centerof the implement. This equal distribution of strain permits facileguiding or steering of the implement whether horsedrawn or power-driven,and permits the implement to absorb vibrations or shocks as the scraperstravel over their course.

Having thus fully described my invention, what I claim as new and desireto secure by Letters Patent is l. The combination with the side bars ofa flexible frame having a fixed pivot point, of a rotary member having afixed axial center, diametrically arranged supporting members fixed tosaid rotary member and pivotally connected to said side bars, and a pairof movable blades carried by said side bars disposed equi-distant aboutsaid axial center.

2. The combination with a member rotatable about a fixed axial center,of a flexible frame having a fixed pivot point, diametrically disposedsupporting members fixed to said rotatable member and having pivotalconnection with the flexible frame, and a pair of spaced bladespivotally supported at diagonal points equi-distant from said axialcenter on said flexible frame. The combination with a rotary ring havingdiametrically arranged, fixed posts, with a flexible frame including aswiveled bolster, and pivoted side bars having pivotal connection withthe fixed posts, a pair of parallel spaced blades, brackets on said sidebars, and pivotal connections between said brackets and blades arrangedon diagonal lines about the center of the ring,

In testimony whereof I aflix my signature.

JAMES B. J ARMIN.

